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ULN2803AG

Name: ULN2803AG
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資料表 ULN2803AG DataSheet
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規格

Manufacturer	LANKE
Package	SOP-18-300mil
number of channels	Eight channels
Operating Temperature	-40℃~+85℃
Current - Collector(Ic)	500mA
Collector - Emitter Voltage VCEO	50V
Voltage - Input(Max)	30V

概述

Description

The ULN2803A is an integrated circuit (IC) designed for driving high current loads, commonly used in applications like relay drivers, lamp drivers, and LED displays. It contains eight NPN Darlington transistor pairs, allowing it to control higher voltage and current devices from low-power logic signals.
Key features include:
- Input Compatibility: It accepts inputs from TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic levels.
- High Current Capability: Each channel can handle up to 500 mA, with a total output current of 3A.
- Protection Diodes: Built-in flyback diodes protect the circuit from voltage spikes when inductive loads are switched.
- Multiple Channels: The eight separate output channels enable control of multiple loads independently.
The ULN2803A is widely used in microcontroller applications for interfacing with various devices, making it a versatile component in electronic designs.

Features

The ULN2803A is an octal (8-channel) high-voltage, high-current Darlington transistor array. Key features include:
1. High Current Handling: Each channel can handle up to 500 mA of output current, suitable for driving loads such as relays and motors.
2. High Voltage Operation: The device can operate with collector-emitter voltages up to 50 V, making it suitable for a variety of applications.
3. Built-in Diodes: Each output is equipped with a flyback diode for driving inductive loads, protecting against voltage spikes.
4. TTL/CMOS Compatible Inputs: The input stages are compatible with standard TTL and CMOS logic levels, facilitating easy integration with digital circuits.
5. Thermal Protection: The package design allows for efficient heat dissipation.
6. Compact Package: Available in 18-pin DIP and SOIC packages, making it suitable for space-constrained applications.
The ULN2803A is commonly used in automation, control systems, and interfacing applications where multiple outputs are needed.

Package

The ULN2803AG is commonly available in a DIP-18 (Dual In-Line Package) format. It may also be found in other package types like SOIC or TSSOP. The DIP-18 version features 18 pins for easy integration into circuit designs.

Pinout

The ULN2803AG is an integrated circuit that features 8 channels of high-voltage, high-current Darlington transistors. It comes in a 18-pin DIP (Dual In-line Package) or other package types.
Pin Count: 18 pins.
Pin Functions:
1. Pins 1-8 (Input pins): These pins (IN1 to IN8) accept input signals that control the corresponding output channels.
2. Pins 9-16 (Output pins): These pins (OUT1 to OUT8) are connected to the collector of the Darlington pairs, providing the switched output.
3. Pin 11 (COM): Common pin for the flyback diodes, used to connect to the power supply for driving inductive loads.
4. Pin 10 (GND): Ground connection for the IC.
5. Pin 12-18: Not used in standard configurations.
The ULN2803AG is commonly used for driving relays, motors, and LEDs, providing necessary current amplification and protection against back EMF.

Manufacturer

The ULN2803AG is manufactured by Texas Instruments (TI), a major American technology company. Texas Instruments is known for designing and producing semiconductors and various integrated circuits (ICs), including operational amplifiers, voltage regulators, and digital signal processors, among others. TI serves a wide range of industries, including automotive, industrial, and consumer electronics, and is recognized for its innovation in analog and embedded processing technologies. The ULN2803AG itself is a high-voltage, high-current Darlington transistor array, commonly used for driving loads such as relays, motors, and LEDs in various electronic applications.

Application

The ULN2803AG is a high-voltage, high-current Darlington transistor array commonly used in applications such as driving relays, motors, and lamps. It's suitable for interfacing between low-voltage microcontrollers and high-power loads, making it ideal for automation systems, industrial control, and robotics. Additionally, it can be used in LED driving circuits and for switching applications in consumer electronics.

Equivalent

The ULN2803A is a popular octal darlington driver chip. Equivalent products include the ULN2003A, ULN2804A, and ULN2004A. Additionally, other compatible options are the TC4427, MC34151, and the L293D for similar driving capabilities. Always verify specific application requirements when selecting alternatives.